Feature spec
Goal: Send a clear invoice after finishing a job.
- Add a client, line items, a due date, and payment instructions.
- Preview the total before exporting a PDF.
- Keep an editable draft if export fails.
App Overview
Readyn: Recovery & Training
Readyn reads the data your Apple Watch already collects and tells you, every morning, how ready your body is — and exactly what to do with it.
$9.99
PRICE
$9.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.
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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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Combine features and design from your favorite apps.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.
States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.
Differentiate and validate
Hypothesis: Contractors need faster repeat invoices more than more templates.
First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.
The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.
Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.
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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
Readyn reads the data your Apple Watch already collects and tells you, every morning, how ready your body is — and exactly what to do with it. KNOW WHERE YOU STAND • Recovery: a daily score from your overnight HRV, resting heart rate, breathing rate, wrist temperature and sleep, compared with your own normal — not a population average. • Energy: a live reading that starts at your recovery and rises and falls with activity, stress and rest through the day. • Sleep: performance against what you actually needed last night, with tonight's suggested bedtime. • Strain: training load on a 0–21 scale, with time in each heart-rate zone. • Health monitor: five overnight vitals checked against your personal range at a glance. • Stress, steps and a running look at your workouts over 30 and 90 days. KNOW WHAT TO DO • Training built for your sport — soccer, basketball, tennis, running, cycling, swimming or general fitness — with sets, reps, loads and heart-rate targets. • Four-week training blocks that build, peak and back off, adjusting each day to how recovered you are. • Every workout scored against the plan, so you can see what actually happened. • A fuel plan for the day: calories and macros timed around your session, with simple meals. ON YOUR WRIST • Apple Watch app with today's recovery, energy, workout and vitals. • Watch-face complications for recovery and energy. PRIVATE BY DESIGN No account. No sign-up. No ads, analytics or tracking. Everything is calculated on your iPhone and your health data never leaves it. READYN PRO Use Readyn with your own Apple Health data with Readyn Pro: a 7-day free trial, then $9.99 a year. Demo data is always free, so you can explore every screen first. Payment is charged to your Apple Account; the subscription renews automatically unless cancelled at least 24 hours before the end of the period. Manage or cancel any time in your Apple Account settings. Readyn is a fitness and wellness app, not a medical device. It does not diagnose or treat any condition. Talk to a doctor before starting a new training or nutrition program. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.
Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
SUGGESTED BUILD STACK
BUILD KIT DIFFICULTY
Not assessed in a Build Kit yet.
A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.
